Outer Gear Slewing Ring Bearing For Boom TruckBoom truck is widely used in the world and it is very popular for many different industries.Shuangzheng slewing bearing covers a wide range of applications, since its very beginning, shuangzheng has developed specifics slewing rings that suits all the particularities of those applications. Thanks to latest technology calculation, design is permanently optimized to follow our customers’ new developments, in order to offer what the market needs.